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root/jsr166/jsr166/src/test/tck/ReentrantLockTest.java

Comparing jsr166/src/test/tck/ReentrantLockTest.java (file contents):
Revision 1.5 by dl, Sat Sep 20 00:31:57 2003 UTC vs.
Revision 1.51 by jsr166, Fri Jun 3 05:07:14 2011 UTC

#	Line 1 | Line 1
1		/*
2	<	* Written by members of JCP JSR-166 Expert Group and released to the
3	<	* public domain. Use, modify, and redistribute this code in any way
4	<	* without acknowledgement. Other contributors include Andrew Wright,
5	<	* Jeffrey Hayes, Pat Fischer, Mike Judd.
2	>	* Written by Doug Lea with assistance from members of JCP JSR-166
3	>	* Expert Group and released to the public domain, as explained at
4	>	* http://creativecommons.org/publicdomain/zero/1.0/
5	>	* Other contributors include Andrew Wright, Jeffrey Hayes,
6	>	* Pat Fisher, Mike Judd.
7		*/
8
9		import junit.framework.*;
10	<	import java.util.concurrent.locks.*;
11	<	import java.util.concurrent.*;
10	>	import java.util.concurrent.locks.Condition;
11	>	import java.util.concurrent.locks.ReentrantLock;
12	>	import java.util.concurrent.CountDownLatch;
13	>	import java.util.concurrent.CyclicBarrier;
14	>	import static java.util.concurrent.TimeUnit.MILLISECONDS;
15		import java.util.*;
12	–	import java.io.*;
16
17		public class ReentrantLockTest extends JSR166TestCase {
18		public static void main(String[] args) {
19	<	junit.textui.TestRunner.run (suite());
19	>	junit.textui.TestRunner.run(suite());
20		}
21		public static Test suite() {
22	<	return new TestSuite(ReentrantLockTest.class);
22	>	return new TestSuite(ReentrantLockTest.class);
23		}
24
25	<	static int HOLD_COUNT_TEST_LIMIT = 20;
26	<
27	<	class InterruptibleLockRunnable implements Runnable {
25	>	/**
26	>	* A runnable calling lockInterruptibly
27	>	*/
28	>	class InterruptibleLockRunnable extends CheckedRunnable {
29		final ReentrantLock lock;
30		InterruptibleLockRunnable(ReentrantLock l) { lock = l; }
31	<	public void run(){
32	<	try{
29	<	lock.lockInterruptibly();
30	<	} catch(InterruptedException success){}
31	>	public void realRun() throws InterruptedException {
32	>	lock.lockInterruptibly();
33		}
34		}
35
36	<	// Same, except must interrupt
37	<	class InterruptedLockRunnable implements Runnable {
36	>	/**
37	>	* A runnable calling lockInterruptibly that expects to be
38	>	* interrupted
39	>	*/
40	>	class InterruptedLockRunnable extends CheckedInterruptedRunnable {
41		final ReentrantLock lock;
42		InterruptedLockRunnable(ReentrantLock l) { lock = l; }
43	<	public void run(){
44	<	try{
40	<	lock.lockInterruptibly();
41	<	threadFail("should throw");
42	<	} catch(InterruptedException success){}
43	>	public void realRun() throws InterruptedException {
44	>	lock.lockInterruptibly();
45		}
46		}
47
48		/**
49	<	* To expose protected methods
49	>	* Subclass to expose protected methods
50		*/
51	<	static class MyReentrantLock extends ReentrantLock {
52	<	MyReentrantLock() { super(); }
53	<	public Collection<Thread> getQueuedThreads() {
54	<	return super.getQueuedThreads();
51	>	static class PublicReentrantLock extends ReentrantLock {
52	>	PublicReentrantLock() { super(); }
53	>	PublicReentrantLock(boolean fair) { super(fair); }
54	>	public Thread getOwner() {
55	>	return super.getOwner();
56		}
57	<	public ConditionObject newCondition() {
58	<	return new MyCondition(this);
57	>	public Collection<Thread> getQueuedThreads() {
58	>	return super.getQueuedThreads();
59		}
60	+	public Collection<Thread> getWaitingThreads(Condition c) {
61	+	return super.getWaitingThreads(c);
62	+	}
63	+	}
64
65	<	static class MyCondition extends ReentrantLock.ConditionObject {
66	<	MyCondition(MyReentrantLock l) { super(l); }
67	<	public Collection<Thread> getWaitingThreads() {
68	<	return super.getWaitingThreads();
69	<	}
65	>	/**
66	>	* Releases write lock, checking that it had a hold count of 1.
67	>	*/
68	>	void releaseLock(PublicReentrantLock lock) {
69	>	assertLockedByMoi(lock);
70	>	lock.unlock();
71	>	assertFalse(lock.isHeldByCurrentThread());
72	>	assertNotLocked(lock);
73	>	}
74	>
75	>	/**
76	>	* Spin-waits until lock.hasQueuedThread(t) becomes true.
77	>	*/
78	>	void waitForQueuedThread(PublicReentrantLock lock, Thread t) {
79	>	long startTime = System.nanoTime();
80	>	while (!lock.hasQueuedThread(t)) {
81	>	if (millisElapsedSince(startTime) > LONG_DELAY_MS)
82	>	throw new AssertionFailedError("timed out");
83	>	Thread.yield();
84		}
85	+	assertTrue(t.isAlive());
86	+	assertTrue(lock.getOwner() != t);
87	+	}
88
89	+	/**
90	+	* Checks that lock is not locked.
91	+	*/
92	+	void assertNotLocked(PublicReentrantLock lock) {
93	+	assertFalse(lock.isLocked());
94	+	assertFalse(lock.isHeldByCurrentThread());
95	+	assertNull(lock.getOwner());
96	+	assertEquals(0, lock.getHoldCount());
97		}
98
99	<	/*
100	<	* Unlocking an unlocked lock throws IllegalMonitorStateException
99	>	/**
100	>	* Checks that lock is locked by the given thread.
101		*/
102	<	public void testIllegalMonitorStateException(){
103	<	ReentrantLock rl = new ReentrantLock();
104	<	try{
105	<	rl.unlock();
106	<	fail("Should of thown Illegal Monitor State Exception");
102	>	void assertLockedBy(PublicReentrantLock lock, Thread t) {
103	>	assertTrue(lock.isLocked());
104	>	assertSame(t, lock.getOwner());
105	>	assertEquals(t == Thread.currentThread(),
106	>	lock.isHeldByCurrentThread());
107	>	assertEquals(t == Thread.currentThread(),
108	>	lock.getHoldCount() > 0);
109	>	}
110
111	<	} catch(IllegalMonitorStateException success){}
111	>	/**
112	>	* Checks that lock is locked by the current thread.
113	>	*/
114	>	void assertLockedByMoi(PublicReentrantLock lock) {
115	>	assertLockedBy(lock, Thread.currentThread());
116		}
117
118	<	/*
119	<	* lockInterruptibly is interruptible.
118	>	/**
119	>	* Checks that condition c has no waiters.
120		*/
121	<	public void testInterruptedException(){
122	<	final ReentrantLock lock = new ReentrantLock();
123	<	lock.lock();
124	<	Thread t = new Thread(new InterruptedLockRunnable(lock));
121	>	void assertHasNoWaiters(PublicReentrantLock lock, Condition c) {
122	>	assertHasWaiters(lock, c, new Thread[] {});
123	>	}
124	>
125	>	/**
126	>	* Checks that condition c has exactly the given waiter threads.
127	>	*/
128	>	void assertHasWaiters(PublicReentrantLock lock, Condition c,
129	>	Thread... threads) {
130	>	lock.lock();
131	>	assertEquals(threads.length > 0, lock.hasWaiters(c));
132	>	assertEquals(threads.length, lock.getWaitQueueLength(c));
133	>	assertEquals(threads.length == 0, lock.getWaitingThreads(c).isEmpty());
134	>	assertEquals(threads.length, lock.getWaitingThreads(c).size());
135	>	assertEquals(new HashSet<Thread>(lock.getWaitingThreads(c)),
136	>	new HashSet<Thread>(Arrays.asList(threads)));
137	>	lock.unlock();
138	>	}
139	>
140	>	enum AwaitMethod { await, awaitTimed, awaitNanos, awaitUntil };
141	>
142	>	/**
143	>	* Awaits condition using the specified AwaitMethod.
144	>	*/
145	>	void await(Condition c, AwaitMethod awaitMethod)
146	>	throws InterruptedException {
147	>	long timeoutMillis = 2 * LONG_DELAY_MS;
148	>	switch (awaitMethod) {
149	>	case await:
150	>	c.await();
151	>	break;
152	>	case awaitTimed:
153	>	assertTrue(c.await(timeoutMillis, MILLISECONDS));
154	>	break;
155	>	case awaitNanos:
156	>	long nanosTimeout = MILLISECONDS.toNanos(timeoutMillis);
157	>	long nanosRemaining = c.awaitNanos(nanosTimeout);
158	>	assertTrue(nanosRemaining > 0);
159	>	break;
160	>	case awaitUntil:
161	>	assertTrue(c.awaitUntil(delayedDate(timeoutMillis)));
162	>	break;
163	>	}
164	>	}
165	>
166	>	/**
167	>	* Constructor sets given fairness, and is in unlocked state
168	>	*/
169	>	public void testConstructor() {
170	>	PublicReentrantLock lock;
171	>
172	>	lock = new PublicReentrantLock();
173	>	assertFalse(lock.isFair());
174	>	assertNotLocked(lock);
175	>
176	>	lock = new PublicReentrantLock(true);
177	>	assertTrue(lock.isFair());
178	>	assertNotLocked(lock);
179	>
180	>	lock = new PublicReentrantLock(false);
181	>	assertFalse(lock.isFair());
182	>	assertNotLocked(lock);
183	>	}
184	>
185	>	/**
186	>	* locking an unlocked lock succeeds
187	>	*/
188	>	public void testLock()      { testLock(false); }
189	>	public void testLock_fair() { testLock(true); }
190	>	public void testLock(boolean fair) {
191	>	PublicReentrantLock lock = new PublicReentrantLock(fair);
192	>	lock.lock();
193	>	assertLockedByMoi(lock);
194	>	releaseLock(lock);
195	>	}
196	>
197	>	/**
198	>	* Unlocking an unlocked lock throws IllegalMonitorStateException
199	>	*/
200	>	public void testUnlock_IMSE()      { testUnlock_IMSE(false); }
201	>	public void testUnlock_IMSE_fair() { testUnlock_IMSE(true); }
202	>	public void testUnlock_IMSE(boolean fair) {
203	>	ReentrantLock lock = new ReentrantLock(fair);
204		try {
87	–	t.start();
88	–	t.interrupt();
205		lock.unlock();
206	<	t.join();
207	<	} catch(Exception e){
208	<	fail("unexpected exception");
93	<	}
94	<	}
206	>	shouldThrow();
207	>	} catch (IllegalMonitorStateException success) {}
208	>	}
209
210	<	/*
211	<	* getLockQueueLength reports number of waiting threads
210	>	/**
211	>	* tryLock on an unlocked lock succeeds
212	>	*/
213	>	public void testTryLock()      { testTryLock(false); }
214	>	public void testTryLock_fair() { testTryLock(true); }
215	>	public void testTryLock(boolean fair) {
216	>	PublicReentrantLock lock = new PublicReentrantLock(fair);
217	>	assertTrue(lock.tryLock());
218	>	assertLockedByMoi(lock);
219	>	assertTrue(lock.tryLock());
220	>	assertLockedByMoi(lock);
221	>	lock.unlock();
222	>	releaseLock(lock);
223	>	}
224	>
225	>	/**
226	>	* hasQueuedThreads reports whether there are waiting threads
227		*/
228	<	public void testgetLockQueueLength(){
229	<	final ReentrantLock lock = new ReentrantLock();
228	>	public void testHasQueuedThreads()      { testHasQueuedThreads(false); }
229	>	public void testHasQueuedThreads_fair() { testHasQueuedThreads(true); }
230	>	public void testHasQueuedThreads(boolean fair) {
231	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
232		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
233		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
234	<	try {
235	<	assertEquals(0, lock.getLockQueueLength());
236	<	lock.lock();
237	<	t1.start();
238	<	Thread.sleep(SHORT_DELAY_MS);
239	<	assertEquals(1, lock.getLockQueueLength());
240	<	t2.start();
241	<	Thread.sleep(SHORT_DELAY_MS);
242	<	assertEquals(2, lock.getLockQueueLength());
243	<	t1.interrupt();
244	<	Thread.sleep(SHORT_DELAY_MS);
245	<	assertEquals(1, lock.getLockQueueLength());
246	<	lock.unlock();
247	<	Thread.sleep(SHORT_DELAY_MS);
248	<	assertEquals(0, lock.getLockQueueLength());
249	<	t1.join();
119	<	t2.join();
120	<	} catch(Exception e){
121	<	fail("unexpected exception");
122	<	}
123	<	}
234	>	assertFalse(lock.hasQueuedThreads());
235	>	lock.lock();
236	>	assertFalse(lock.hasQueuedThreads());
237	>	t1.start();
238	>	waitForQueuedThread(lock, t1);
239	>	assertTrue(lock.hasQueuedThreads());
240	>	t2.start();
241	>	waitForQueuedThread(lock, t2);
242	>	assertTrue(lock.hasQueuedThreads());
243	>	t1.interrupt();
244	>	awaitTermination(t1);
245	>	assertTrue(lock.hasQueuedThreads());
246	>	lock.unlock();
247	>	awaitTermination(t2);
248	>	assertFalse(lock.hasQueuedThreads());
249	>	}
250
251	<	/*
252	<	* getQueuedThreads includes waiting threads
251	>	/**
252	>	* getQueueLength reports number of waiting threads
253		*/
254	<	public void testGetQueuedThreads(){
255	<	final MyReentrantLock lock = new MyReentrantLock();
254	>	public void testGetQueueLength()      { testGetQueueLength(false); }
255	>	public void testGetQueueLength_fair() { testGetQueueLength(true); }
256	>	public void testGetQueueLength(boolean fair) {
257	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
258		Thread t1 = new Thread(new InterruptedLockRunnable(lock));
259		Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
260	<	try {
261	<	assertTrue(lock.getQueuedThreads().isEmpty());
262	<	lock.lock();
263	<	assertTrue(lock.getQueuedThreads().isEmpty());
264	<	t1.start();
265	<	Thread.sleep(SHORT_DELAY_MS);
266	<	assertTrue(lock.getQueuedThreads().contains(t1));
267	<	t2.start();
268	<	Thread.sleep(SHORT_DELAY_MS);
269	<	assertTrue(lock.getQueuedThreads().contains(t1));
270	<	assertTrue(lock.getQueuedThreads().contains(t2));
271	<	t1.interrupt();
272	<	Thread.sleep(SHORT_DELAY_MS);
273	<	assertFalse(lock.getQueuedThreads().contains(t1));
274	<	assertTrue(lock.getQueuedThreads().contains(t2));
147	<	lock.unlock();
148	<	Thread.sleep(SHORT_DELAY_MS);
149	<	assertTrue(lock.getQueuedThreads().isEmpty());
150	<	t1.join();
151	<	t2.join();
152	<	} catch(Exception e){
153	<	fail("unexpected exception");
154	<	}
155	<	}
260	>	assertEquals(0, lock.getQueueLength());
261	>	lock.lock();
262	>	t1.start();
263	>	waitForQueuedThread(lock, t1);
264	>	assertEquals(1, lock.getQueueLength());
265	>	t2.start();
266	>	waitForQueuedThread(lock, t2);
267	>	assertEquals(2, lock.getQueueLength());
268	>	t1.interrupt();
269	>	awaitTermination(t1);
270	>	assertEquals(1, lock.getQueueLength());
271	>	lock.unlock();
272	>	awaitTermination(t2);
273	>	assertEquals(0, lock.getQueueLength());
274	>	}
275
276	+	/**
277	+	* hasQueuedThread(null) throws NPE
278	+	*/
279	+	public void testHasQueuedThreadNPE()      { testHasQueuedThreadNPE(false); }
280	+	public void testHasQueuedThreadNPE_fair() { testHasQueuedThreadNPE(true); }
281	+	public void testHasQueuedThreadNPE(boolean fair) {
282	+	final ReentrantLock lock = new ReentrantLock(fair);
283	+	try {
284	+	lock.hasQueuedThread(null);
285	+	shouldThrow();
286	+	} catch (NullPointerException success) {}
287	+	}
288
289	<	/*
290	<	* timed trylock is interruptible.
289	>	/**
290	>	* hasQueuedThread reports whether a thread is queued
291		*/
292	<	public void testInterruptedException2(){
293	<	final ReentrantLock lock = new ReentrantLock();
294	<	lock.lock();
295	<	Thread t = new Thread(new Runnable() {
296	<	public void run(){
297	<	try{
298	<	lock.tryLock(MEDIUM_DELAY_MS,TimeUnit.MILLISECONDS);
299	<	threadFail("should throw");
300	<	} catch(InterruptedException success){}
301	<	}
302	<	});
303	<	try {
304	<	t.start();
305	<	t.interrupt();
306	<	} catch(Exception e){
307	<	fail("unexpected exception");
308	<	}
292	>	public void testHasQueuedThread()      { testHasQueuedThread(false); }
293	>	public void testHasQueuedThread_fair() { testHasQueuedThread(true); }
294	>	public void testHasQueuedThread(boolean fair) {
295	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
296	>	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
297	>	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
298	>	assertFalse(lock.hasQueuedThread(t1));
299	>	assertFalse(lock.hasQueuedThread(t2));
300	>	lock.lock();
301	>	t1.start();
302	>	waitForQueuedThread(lock, t1);
303	>	assertTrue(lock.hasQueuedThread(t1));
304	>	assertFalse(lock.hasQueuedThread(t2));
305	>	t2.start();
306	>	waitForQueuedThread(lock, t2);
307	>	assertTrue(lock.hasQueuedThread(t1));
308	>	assertTrue(lock.hasQueuedThread(t2));
309	>	t1.interrupt();
310	>	awaitTermination(t1);
311	>	assertFalse(lock.hasQueuedThread(t1));
312	>	assertTrue(lock.hasQueuedThread(t2));
313	>	lock.unlock();
314	>	awaitTermination(t2);
315	>	assertFalse(lock.hasQueuedThread(t1));
316	>	assertFalse(lock.hasQueuedThread(t2));
317		}
318
319	+	/**
320	+	* getQueuedThreads includes waiting threads
321	+	*/
322	+	public void testGetQueuedThreads()      { testGetQueuedThreads(false); }
323	+	public void testGetQueuedThreads_fair() { testGetQueuedThreads(true); }
324	+	public void testGetQueuedThreads(boolean fair) {
325	+	final PublicReentrantLock lock = new PublicReentrantLock(fair);
326	+	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
327	+	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
328	+	assertTrue(lock.getQueuedThreads().isEmpty());
329	+	lock.lock();
330	+	assertTrue(lock.getQueuedThreads().isEmpty());
331	+	t1.start();
332	+	waitForQueuedThread(lock, t1);
333	+	assertEquals(1, lock.getQueuedThreads().size());
334	+	assertTrue(lock.getQueuedThreads().contains(t1));
335	+	t2.start();
336	+	waitForQueuedThread(lock, t2);
337	+	assertEquals(2, lock.getQueuedThreads().size());
338	+	assertTrue(lock.getQueuedThreads().contains(t1));
339	+	assertTrue(lock.getQueuedThreads().contains(t2));
340	+	t1.interrupt();
341	+	awaitTermination(t1);
342	+	assertFalse(lock.getQueuedThreads().contains(t1));
343	+	assertTrue(lock.getQueuedThreads().contains(t2));
344	+	assertEquals(1, lock.getQueuedThreads().size());
345	+	lock.unlock();
346	+	awaitTermination(t2);
347	+	assertTrue(lock.getQueuedThreads().isEmpty());
348	+	}
349
350		/**
351	<	* Trylock on a locked lock fails
351	>	* timed tryLock is interruptible
352		*/
353	<	public void testTryLockWhenLocked() {
354	<	final ReentrantLock lock = new ReentrantLock();
355	<	lock.lock();
356	<	Thread t = new Thread(new Runnable() {
357	<	public void run(){
358	<	threadAssertFalse(lock.tryLock());
359	<	}
360	<	});
361	<	try {
362	<	t.start();
363	<	t.join();
364	<	lock.unlock();
365	<	} catch(Exception e){
366	<	fail("unexpected exception");
367	<	}
199	<	}
353	>	public void testTryLock_Interruptible()      { testTryLock_Interruptible(false); }
354	>	public void testTryLock_Interruptible_fair() { testTryLock_Interruptible(true); }
355	>	public void testTryLock_Interruptible(boolean fair) {
356	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
357	>	lock.lock();
358	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
359	>	public void realRun() throws InterruptedException {
360	>	lock.tryLock(2 * LONG_DELAY_MS, MILLISECONDS);
361	>	}});
362	>
363	>	waitForQueuedThread(lock, t);
364	>	t.interrupt();
365	>	awaitTermination(t);
366	>	releaseLock(lock);
367	>	}
368
369		/**
370	<	* Timed Trylock on a locked lock times out
370	>	* tryLock on a locked lock fails
371		*/
372	<	public void testTryLock_Timeout(){
373	<	final ReentrantLock lock = new ReentrantLock();
374	<	lock.lock();
375	<	Thread t = new Thread(new Runnable() {
376	<	public void run(){
377	<	try {
378	<	threadAssertFalse(lock.tryLock(1, TimeUnit.MILLISECONDS));
379	<	} catch (Exception ex) {
380	<	threadFail("unexpected exception");
381	<	}
382	<	}
383	<	});
384	<	try {
385	<	t.start();
386	<	t.join();
387	<	lock.unlock();
388	<	} catch(Exception e){
389	<	fail("unexpected exception");
390	<	}
391	<	}
392	<
372	>	public void testTryLockWhenLocked()      { testTryLockWhenLocked(false); }
373	>	public void testTryLockWhenLocked_fair() { testTryLockWhenLocked(true); }
374	>	public void testTryLockWhenLocked(boolean fair) {
375	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
376	>	lock.lock();
377	>	Thread t = newStartedThread(new CheckedRunnable() {
378	>	public void realRun() {
379	>	assertFalse(lock.tryLock());
380	>	}});
381	>
382	>	awaitTermination(t);
383	>	releaseLock(lock);
384	>	}
385	>
386	>	/**
387	>	* Timed tryLock on a locked lock times out
388	>	*/
389	>	public void testTryLock_Timeout()      { testTryLock_Timeout(false); }
390	>	public void testTryLock_Timeout_fair() { testTryLock_Timeout(true); }
391	>	public void testTryLock_Timeout(boolean fair) {
392	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
393	>	lock.lock();
394	>	Thread t = newStartedThread(new CheckedRunnable() {
395	>	public void realRun() throws InterruptedException {
396	>	long startTime = System.nanoTime();
397	>	long timeoutMillis = 10;
398	>	assertFalse(lock.tryLock(timeoutMillis, MILLISECONDS));
399	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
400	>	}});
401	>
402	>	awaitTermination(t);
403	>	releaseLock(lock);
404	>	}
405	>
406		/**
407		* getHoldCount returns number of recursive holds
408		*/
409	<	public void testGetHoldCount() {
410	<	ReentrantLock lock = new ReentrantLock();
411	<	for(int i = 1; i <= ReentrantLockTest.HOLD_COUNT_TEST_LIMIT;i++) {
412	<	lock.lock();
413	<	assertEquals(i,lock.getHoldCount());
414	<	}
415	<	for(int i = ReentrantLockTest.HOLD_COUNT_TEST_LIMIT; i > 0; i--) {
416	<	lock.unlock();
417	<	assertEquals(i-1,lock.getHoldCount());
418	<	}
409	>	public void testGetHoldCount()      { testGetHoldCount(false); }
410	>	public void testGetHoldCount_fair() { testGetHoldCount(true); }
411	>	public void testGetHoldCount(boolean fair) {
412	>	ReentrantLock lock = new ReentrantLock(fair);
413	>	for (int i = 1; i <= SIZE; i++) {
414	>	lock.lock();
415	>	assertEquals(i, lock.getHoldCount());
416	>	}
417	>	for (int i = SIZE; i > 0; i--) {
418	>	lock.unlock();
419	>	assertEquals(i-1, lock.getHoldCount());
420	>	}
421		}
422	<
240	<
422	>
423		/**
424		* isLocked is true when locked and false when not
425		*/
426	<	public void testIsLocked() {
427	<	final ReentrantLock lock = new ReentrantLock();
428	<	lock.lock();
429	<	assertTrue(lock.isLocked());
430	<	lock.unlock();
431	<	assertFalse(lock.isLocked());
432	<	Thread t = new Thread(new Runnable() {
433	<	public void run() {
434	<	lock.lock();
253	<	try {
254	<	Thread.sleep(SMALL_DELAY_MS);
255	<	}
256	<	catch(Exception e) {
257	<	threadFail("unexpected exception");
258	<	}
259	<	lock.unlock();
260	<	}
261	<	});
262	<	try{
263	<	t.start();
264	<	Thread.sleep(SHORT_DELAY_MS);
426	>	public void testIsLocked()      { testIsLocked(false); }
427	>	public void testIsLocked_fair() { testIsLocked(true); }
428	>	public void testIsLocked(boolean fair) {
429	>	try {
430	>	final ReentrantLock lock = new ReentrantLock(fair);
431	>	assertFalse(lock.isLocked());
432	>	lock.lock();
433	>	assertTrue(lock.isLocked());
434	>	lock.lock();
435		assertTrue(lock.isLocked());
436	<	t.join();
436	>	lock.unlock();
437	>	assertTrue(lock.isLocked());
438	>	lock.unlock();
439		assertFalse(lock.isLocked());
440	<	} catch(Exception e){
441	<	fail("unexpected exception");
440	>	final CyclicBarrier barrier = new CyclicBarrier(2);
441	>	Thread t = newStartedThread(new CheckedRunnable() {
442	>	public void realRun() throws Exception {
443	>	lock.lock();
444	>	assertTrue(lock.isLocked());
445	>	barrier.await();
446	>	barrier.await();
447	>	lock.unlock();
448	>	}});
449	>
450	>	barrier.await();
451	>	assertTrue(lock.isLocked());
452	>	barrier.await();
453	>	awaitTermination(t);
454	>	assertFalse(lock.isLocked());
455	>	} catch (Exception e) {
456	>	threadUnexpectedException(e);
457		}
458		}
459
273	–
460		/**
461		* lockInterruptibly succeeds when unlocked, else is interruptible
462		*/
463	<	public void testLockInterruptibly() {
464	<	final ReentrantLock lock = new ReentrantLock();
465	<	try {
466	<	lock.lockInterruptibly();
281	<	} catch(Exception e) {
282	<	fail("unexpected exception");
283	<	}
284	<	Thread t = new Thread(new InterruptedLockRunnable(lock));
463	>	public void testLockInterruptibly()      { testLockInterruptibly(false); }
464	>	public void testLockInterruptibly_fair() { testLockInterruptibly(true); }
465	>	public void testLockInterruptibly(boolean fair) {
466	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
467		try {
468	<	t.start();
469	<	t.interrupt();
470	<	assertTrue(lock.isLocked());
289	<	assertTrue(lock.isHeldByCurrentThread());
290	<	t.join();
291	<	} catch(Exception e){
292	<	fail("unexpected exception");
468	>	lock.lockInterruptibly();
469	>	} catch (InterruptedException ie) {
470	>	threadUnexpectedException(ie);
471		}
472	+	assertLockedByMoi(lock);
473	+	Thread t = newStartedThread(new InterruptedLockRunnable(lock));
474	+	waitForQueuedThread(lock, t);
475	+	t.interrupt();
476	+	assertTrue(lock.isLocked());
477	+	assertTrue(lock.isHeldByCurrentThread());
478	+	awaitTermination(t);
479	+	releaseLock(lock);
480		}
481
482	<	public void testAwait_IllegalMonitor() {
483	<	final ReentrantLock lock = new ReentrantLock();
482	>	/**
483	>	* Calling await without holding lock throws IllegalMonitorStateException
484	>	*/
485	>	public void testAwait_IMSE()      { testAwait_IMSE(false); }
486	>	public void testAwait_IMSE_fair() { testAwait_IMSE(true); }
487	>	public void testAwait_IMSE(boolean fair) {
488	>	final ReentrantLock lock = new ReentrantLock(fair);
489		final Condition c = lock.newCondition();
490	<	try {
491	<	c.await();
492	<	fail("should throw");
493	<	}
494	<	catch (IllegalMonitorStateException success) {
495	<	}
496	<	catch (Exception ex) {
497	<	fail("should throw IMSE");
490	>	for (AwaitMethod awaitMethod : AwaitMethod.values()) {
491	>	long startTime = System.nanoTime();
492	>	try {
493	>	await(c, awaitMethod);
494	>	shouldThrow();
495	>	} catch (IllegalMonitorStateException success) {
496	>	} catch (InterruptedException e) { threadUnexpectedException(e); }
497	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
498		}
499		}
500
501	<	public void testSignal_IllegalMonitor() {
502	<	final ReentrantLock lock = new ReentrantLock();
501	>	/**
502	>	* Calling signal without holding lock throws IllegalMonitorStateException
503	>	*/
504	>	public void testSignal_IMSE()      { testSignal_IMSE(false); }
505	>	public void testSignal_IMSE_fair() { testSignal_IMSE(true); }
506	>	public void testSignal_IMSE(boolean fair) {
507	>	final ReentrantLock lock = new ReentrantLock(fair);
508		final Condition c = lock.newCondition();
509		try {
510		c.signal();
511	<	fail("should throw");
512	<	}
317	<	catch (IllegalMonitorStateException success) {
318	<	}
319	<	catch (Exception ex) {
320	<	fail("should throw IMSE");
321	<	}
511	>	shouldThrow();
512	>	} catch (IllegalMonitorStateException success) {}
513		}
514
515	<	public void testAwaitNanos_Timeout() {
516	<	final ReentrantLock lock = new ReentrantLock();
517	<	final Condition c = lock.newCondition();
515	>	/**
516	>	* awaitNanos without a signal times out
517	>	*/
518	>	public void testAwaitNanos_Timeout()      { testAwaitNanos_Timeout(false); }
519	>	public void testAwaitNanos_Timeout_fair() { testAwaitNanos_Timeout(true); }
520	>	public void testAwaitNanos_Timeout(boolean fair) {
521		try {
522	+	final ReentrantLock lock = new ReentrantLock(fair);
523	+	final Condition c = lock.newCondition();
524		lock.lock();
525	<	long t = c.awaitNanos(100);
526	<	assertTrue(t <= 0);
525	>	long startTime = System.nanoTime();
526	>	long timeoutMillis = 10;
527	>	long timeoutNanos = MILLISECONDS.toNanos(timeoutMillis);
528	>	long nanosRemaining = c.awaitNanos(timeoutNanos);
529	>	assertTrue(nanosRemaining <= 0);
530	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
531		lock.unlock();
532	<	}
533	<	catch (Exception ex) {
334	<	fail("unexpected exception");
532	>	} catch (InterruptedException e) {
533	>	threadUnexpectedException(e);
534		}
535		}
536
537	<	public void testAwait_Timeout() {
538	<	final ReentrantLock lock = new ReentrantLock();
539	<	final Condition c = lock.newCondition();
537	>	/**
538	>	* timed await without a signal times out
539	>	*/
540	>	public void testAwait_Timeout()      { testAwait_Timeout(false); }
541	>	public void testAwait_Timeout_fair() { testAwait_Timeout(true); }
542	>	public void testAwait_Timeout(boolean fair) {
543		try {
544	+	final ReentrantLock lock = new ReentrantLock(fair);
545	+	final Condition c = lock.newCondition();
546		lock.lock();
547	<	assertFalse(c.await(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
547	>	long startTime = System.nanoTime();
548	>	long timeoutMillis = 10;
549	>	assertFalse(c.await(timeoutMillis, MILLISECONDS));
550	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
551		lock.unlock();
552	<	}
553	<	catch (Exception ex) {
347	<	fail("unexpected exception");
552	>	} catch (InterruptedException e) {
553	>	threadUnexpectedException(e);
554		}
555		}
556
557	<	public void testAwaitUntil_Timeout() {
558	<	final ReentrantLock lock = new ReentrantLock();
559	<	final Condition c = lock.newCondition();
557	>	/**
558	>	* awaitUntil without a signal times out
559	>	*/
560	>	public void testAwaitUntil_Timeout()      { testAwaitUntil_Timeout(false); }
561	>	public void testAwaitUntil_Timeout_fair() { testAwaitUntil_Timeout(true); }
562	>	public void testAwaitUntil_Timeout(boolean fair) {
563		try {
564	+	final ReentrantLock lock = new ReentrantLock(fair);
565	+	final Condition c = lock.newCondition();
566		lock.lock();
567	+	long startTime = System.nanoTime();
568	+	long timeoutMillis = 10;
569		java.util.Date d = new java.util.Date();
570	<	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
570	>	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + timeoutMillis)));
571	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
572		lock.unlock();
573	<	}
574	<	catch (Exception ex) {
361	<	fail("unexpected exception");
573	>	} catch (InterruptedException e) {
574	>	threadUnexpectedException(e);
575		}
576		}
577
578	<	public void testAwait() {
579	<	final ReentrantLock lock = new ReentrantLock();
580	<	final ReentrantLock.ConditionObject c = lock.newCondition();
581	<	Thread t = new Thread(new Runnable() {
582	<	public void run() {
583	<	try {
584	<	lock.lock();
585	<	c.await();
586	<	lock.unlock();
587	<	}
588	<	catch(InterruptedException e) {
589	<	threadFail("unexpected exception");
590	<	}
591	<	}
592	<	});
578	>	/**
579	>	* await returns when signalled
580	>	*/
581	>	public void testAwait()      { testAwait(false); }
582	>	public void testAwait_fair() { testAwait(true); }
583	>	public void testAwait(boolean fair) {
584	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
585	>	final Condition c = lock.newCondition();
586	>	final CountDownLatch locked = new CountDownLatch(1);
587	>	Thread t = newStartedThread(new CheckedRunnable() {
588	>	public void realRun() throws InterruptedException {
589	>	lock.lock();
590	>	locked.countDown();
591	>	c.await();
592	>	lock.unlock();
593	>	}});
594	>
595	>	await(locked);
596	>	lock.lock();
597	>	assertHasWaiters(lock, c, t);
598	>	c.signal();
599	>	assertHasNoWaiters(lock, c);
600	>	assertTrue(t.isAlive());
601	>	lock.unlock();
602	>	awaitTermination(t);
603	>	}
604
605	<	try {
606	<	t.start();
607	<	Thread.sleep(SHORT_DELAY_MS);
608	<	lock.lock();
609	<	c.signal();
610	<	lock.unlock();
611	<	t.join(SHORT_DELAY_MS);
612	<	assertFalse(t.isAlive());
613	<	}
614	<	catch (Exception ex) {
615	<	fail("unexpected exception");
392	<	}
605	>	/**
606	>	* hasWaiters throws NPE if null
607	>	*/
608	>	public void testHasWaitersNPE()      { testHasWaitersNPE(false); }
609	>	public void testHasWaitersNPE_fair() { testHasWaitersNPE(true); }
610	>	public void testHasWaitersNPE(boolean fair) {
611	>	final ReentrantLock lock = new ReentrantLock(fair);
612	>	try {
613	>	lock.hasWaiters(null);
614	>	shouldThrow();
615	>	} catch (NullPointerException success) {}
616		}
617
618	<	public void testHasWaiters() {
619	<	final ReentrantLock lock = new ReentrantLock();
620	<	final ReentrantLock.ConditionObject c = lock.newCondition();
621	<	Thread t = new Thread(new Runnable() {
622	<	public void run() {
623	<	try {
624	<	lock.lock();
625	<	threadAssertFalse(c.hasWaiters());
626	<	threadAssertEquals(0, c.getWaitQueueLength());
627	<	c.await();
628	<	lock.unlock();
629	<	}
407	<	catch(InterruptedException e) {
408	<	threadFail("unexpected exception");
409	<	}
410	<	}
411	<	});
618	>	/**
619	>	* getWaitQueueLength throws NPE if null
620	>	*/
621	>	public void testGetWaitQueueLengthNPE()      { testGetWaitQueueLengthNPE(false); }
622	>	public void testGetWaitQueueLengthNPE_fair() { testGetWaitQueueLengthNPE(true); }
623	>	public void testGetWaitQueueLengthNPE(boolean fair) {
624	>	final ReentrantLock lock = new ReentrantLock(fair);
625	>	try {
626	>	lock.getWaitQueueLength(null);
627	>	shouldThrow();
628	>	} catch (NullPointerException success) {}
629	>	}
630
631	<	try {
632	<	t.start();
633	<	Thread.sleep(SHORT_DELAY_MS);
634	<	lock.lock();
635	<	assertTrue(c.hasWaiters());
636	<	assertEquals(1, c.getWaitQueueLength());
637	<	c.signal();
638	<	lock.unlock();
639	<	Thread.sleep(SHORT_DELAY_MS);
640	<	lock.lock();
641	<	assertFalse(c.hasWaiters());
424	<	assertEquals(0, c.getWaitQueueLength());
425	<	lock.unlock();
426	<	t.join(SHORT_DELAY_MS);
427	<	assertFalse(t.isAlive());
428	<	}
429	<	catch (Exception ex) {
430	<	fail("unexpected exception");
431	<	}
631	>	/**
632	>	* getWaitingThreads throws NPE if null
633	>	*/
634	>	public void testGetWaitingThreadsNPE()      { testGetWaitingThreadsNPE(false); }
635	>	public void testGetWaitingThreadsNPE_fair() { testGetWaitingThreadsNPE(true); }
636	>	public void testGetWaitingThreadsNPE(boolean fair) {
637	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
638	>	try {
639	>	lock.getWaitingThreads(null);
640	>	shouldThrow();
641	>	} catch (NullPointerException success) {}
642		}
643
644	<	public void testGetWaitQueueLength() {
645	<	final ReentrantLock lock = new ReentrantLock();
646	<	final ReentrantLock.ConditionObject c = lock.newCondition();
647	<	Thread t1 = new Thread(new Runnable() {
648	<	public void run() {
649	<	try {
650	<	lock.lock();
651	<	threadAssertFalse(c.hasWaiters());
652	<	threadAssertEquals(0, c.getWaitQueueLength());
653	<	c.await();
654	<	lock.unlock();
655	<	}
656	<	catch(InterruptedException e) {
657	<	threadFail("unexpected exception");
448	<	}
449	<	}
450	<	});
451	<
452	<	Thread t2 = new Thread(new Runnable() {
453	<	public void run() {
454	<	try {
455	<	lock.lock();
456	<	threadAssertTrue(c.hasWaiters());
457	<	threadAssertEquals(1, c.getWaitQueueLength());
458	<	c.await();
459	<	lock.unlock();
460	<	}
461	<	catch(InterruptedException e) {
462	<	threadFail("unexpected exception");
463	<	}
464	<	}
465	<	});
644	>	/**
645	>	* hasWaiters throws IllegalArgumentException if not owned
646	>	*/
647	>	public void testHasWaitersIAE()      { testHasWaitersIAE(false); }
648	>	public void testHasWaitersIAE_fair() { testHasWaitersIAE(true); }
649	>	public void testHasWaitersIAE(boolean fair) {
650	>	final ReentrantLock lock = new ReentrantLock(fair);
651	>	final Condition c = lock.newCondition();
652	>	final ReentrantLock lock2 = new ReentrantLock(fair);
653	>	try {
654	>	lock2.hasWaiters(c);
655	>	shouldThrow();
656	>	} catch (IllegalArgumentException success) {}
657	>	}
658
659	+	/**
660	+	* hasWaiters throws IllegalMonitorStateException if not locked
661	+	*/
662	+	public void testHasWaitersIMSE()      { testHasWaitersIMSE(false); }
663	+	public void testHasWaitersIMSE_fair() { testHasWaitersIMSE(true); }
664	+	public void testHasWaitersIMSE(boolean fair) {
665	+	final ReentrantLock lock = new ReentrantLock(fair);
666	+	final Condition c = lock.newCondition();
667		try {
668	<	t1.start();
669	<	Thread.sleep(SHORT_DELAY_MS);
670	<	t2.start();
471	<	Thread.sleep(SHORT_DELAY_MS);
472	<	lock.lock();
473	<	assertTrue(c.hasWaiters());
474	<	assertEquals(2, c.getWaitQueueLength());
475	<	c.signalAll();
476	<	lock.unlock();
477	<	Thread.sleep(SHORT_DELAY_MS);
478	<	lock.lock();
479	<	assertFalse(c.hasWaiters());
480	<	assertEquals(0, c.getWaitQueueLength());
481	<	lock.unlock();
482	<	t1.join(SHORT_DELAY_MS);
483	<	t2.join(SHORT_DELAY_MS);
484	<	assertFalse(t1.isAlive());
485	<	assertFalse(t2.isAlive());
486	<	}
487	<	catch (Exception ex) {
488	<	fail("unexpected exception");
489	<	}
668	>	lock.hasWaiters(c);
669	>	shouldThrow();
670	>	} catch (IllegalMonitorStateException success) {}
671		}
672
673	<	public void testGetWaitingThreads() {
674	<	final MyReentrantLock lock = new MyReentrantLock();
675	<	final MyReentrantLock.MyCondition c = (MyReentrantLock.MyCondition)lock.newCondition();
676	<	Thread t1 = new Thread(new Runnable() {
677	<	public void run() {
678	<	try {
679	<	lock.lock();
680	<	threadAssertTrue(c.getWaitingThreads().isEmpty());
681	<	c.await();
682	<	lock.unlock();
683	<	}
684	<	catch(InterruptedException e) {
685	<	threadFail("unexpected exception");
686	<	}
506	<	}
507	<	});
508	<
509	<	Thread t2 = new Thread(new Runnable() {
510	<	public void run() {
511	<	try {
512	<	lock.lock();
513	<	threadAssertFalse(c.getWaitingThreads().isEmpty());
514	<	c.await();
515	<	lock.unlock();
516	<	}
517	<	catch(InterruptedException e) {
518	<	threadFail("unexpected exception");
519	<	}
520	<	}
521	<	});
673	>	/**
674	>	* getWaitQueueLength throws IllegalArgumentException if not owned
675	>	*/
676	>	public void testGetWaitQueueLengthIAE()      { testGetWaitQueueLengthIAE(false); }
677	>	public void testGetWaitQueueLengthIAE_fair() { testGetWaitQueueLengthIAE(true); }
678	>	public void testGetWaitQueueLengthIAE(boolean fair) {
679	>	final ReentrantLock lock = new ReentrantLock(fair);
680	>	final Condition c = lock.newCondition();
681	>	final ReentrantLock lock2 = new ReentrantLock(fair);
682	>	try {
683	>	lock2.getWaitQueueLength(c);
684	>	shouldThrow();
685	>	} catch (IllegalArgumentException success) {}
686	>	}
687
688	+	/**
689	+	* getWaitQueueLength throws IllegalMonitorStateException if not locked
690	+	*/
691	+	public void testGetWaitQueueLengthIMSE()      { testGetWaitQueueLengthIMSE(false); }
692	+	public void testGetWaitQueueLengthIMSE_fair() { testGetWaitQueueLengthIMSE(true); }
693	+	public void testGetWaitQueueLengthIMSE(boolean fair) {
694	+	final ReentrantLock lock = new ReentrantLock(fair);
695	+	final Condition c = lock.newCondition();
696		try {
697	<	lock.lock();
698	<	assertTrue(c.getWaitingThreads().isEmpty());
699	<	lock.unlock();
527	<	t1.start();
528	<	Thread.sleep(SHORT_DELAY_MS);
529	<	t2.start();
530	<	Thread.sleep(SHORT_DELAY_MS);
531	<	lock.lock();
532	<	assertTrue(c.hasWaiters());
533	<	assertTrue(c.getWaitingThreads().contains(t1));
534	<	assertTrue(c.getWaitingThreads().contains(t2));
535	<	c.signalAll();
536	<	lock.unlock();
537	<	Thread.sleep(SHORT_DELAY_MS);
538	<	lock.lock();
539	<	assertFalse(c.hasWaiters());
540	<	assertTrue(c.getWaitingThreads().isEmpty());
541	<	lock.unlock();
542	<	t1.join(SHORT_DELAY_MS);
543	<	t2.join(SHORT_DELAY_MS);
544	<	assertFalse(t1.isAlive());
545	<	assertFalse(t2.isAlive());
546	<	}
547	<	catch (Exception ex) {
548	<	fail("unexpected exception");
549	<	}
697	>	lock.getWaitQueueLength(c);
698	>	shouldThrow();
699	>	} catch (IllegalMonitorStateException success) {}
700		}
701
702	<	public void testAwaitUninterruptibly() {
703	<	final ReentrantLock lock = new ReentrantLock();
702	>	/**
703	>	* getWaitingThreads throws IllegalArgumentException if not owned
704	>	*/
705	>	public void testGetWaitingThreadsIAE()      { testGetWaitingThreadsIAE(false); }
706	>	public void testGetWaitingThreadsIAE_fair() { testGetWaitingThreadsIAE(true); }
707	>	public void testGetWaitingThreadsIAE(boolean fair) {
708	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
709		final Condition c = lock.newCondition();
710	<	Thread t = new Thread(new Runnable() {
711	<	public void run() {
712	<	lock.lock();
713	<	c.awaitUninterruptibly();
714	<	lock.unlock();
715	<	}
561	<	});
710	>	final PublicReentrantLock lock2 = new PublicReentrantLock(fair);
711	>	try {
712	>	lock2.getWaitingThreads(c);
713	>	shouldThrow();
714	>	} catch (IllegalArgumentException success) {}
715	>	}
716
717	+	/**
718	+	* getWaitingThreads throws IllegalMonitorStateException if not locked
719	+	*/
720	+	public void testGetWaitingThreadsIMSE()      { testGetWaitingThreadsIMSE(false); }
721	+	public void testGetWaitingThreadsIMSE_fair() { testGetWaitingThreadsIMSE(true); }
722	+	public void testGetWaitingThreadsIMSE(boolean fair) {
723	+	final PublicReentrantLock lock = new PublicReentrantLock(fair);
724	+	final Condition c = lock.newCondition();
725		try {
726	<	t.start();
727	<	Thread.sleep(SHORT_DELAY_MS);
728	<	t.interrupt();
567	<	lock.lock();
568	<	c.signal();
569	<	lock.unlock();
570	<	t.join(SHORT_DELAY_MS);
571	<	assertFalse(t.isAlive());
572	<	}
573	<	catch (Exception ex) {
574	<	fail("unexpected exception");
575	<	}
726	>	lock.getWaitingThreads(c);
727	>	shouldThrow();
728	>	} catch (IllegalMonitorStateException success) {}
729		}
730
731	<	public void testAwait_Interrupt() {
732	<	final ReentrantLock lock = new ReentrantLock();
731	>	/**
732	>	* hasWaiters returns true when a thread is waiting, else false
733	>	*/
734	>	public void testHasWaiters()      { testHasWaiters(false); }
735	>	public void testHasWaiters_fair() { testHasWaiters(true); }
736	>	public void testHasWaiters(boolean fair) {
737	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
738		final Condition c = lock.newCondition();
739	<	Thread t = new Thread(new Runnable() {
740	<	public void run() {
741	<	try {
742	<	lock.lock();
743	<	c.await();
744	<	lock.unlock();
745	<	threadFail("should throw");
746	<	}
747	<	catch(InterruptedException success) {
748	<	}
749	<	}
750	<	});
739	>	final CountDownLatch pleaseSignal = new CountDownLatch(1);
740	>	Thread t = newStartedThread(new CheckedRunnable() {
741	>	public void realRun() throws InterruptedException {
742	>	lock.lock();
743	>	assertHasNoWaiters(lock, c);
744	>	assertFalse(lock.hasWaiters(c));
745	>	pleaseSignal.countDown();
746	>	c.await();
747	>	assertHasNoWaiters(lock, c);
748	>	assertFalse(lock.hasWaiters(c));
749	>	lock.unlock();
750	>	}});
751	>
752	>	await(pleaseSignal);
753	>	lock.lock();
754	>	assertHasWaiters(lock, c, t);
755	>	assertTrue(lock.hasWaiters(c));
756	>	c.signal();
757	>	assertHasNoWaiters(lock, c);
758	>	assertFalse(lock.hasWaiters(c));
759	>	lock.unlock();
760	>	awaitTermination(t);
761	>	assertHasNoWaiters(lock, c);
762	>	}
763
764	<	try {
765	<	t.start();
766	<	Thread.sleep(SHORT_DELAY_MS);
767	<	t.interrupt();
768	<	t.join(SHORT_DELAY_MS);
769	<	assertFalse(t.isAlive());
770	<	}
771	<	catch (Exception ex) {
772	<	fail("unexpected exception");
773	<	}
764	>	/**
765	>	* getWaitQueueLength returns number of waiting threads
766	>	*/
767	>	public void testGetWaitQueueLength()      { testGetWaitQueueLength(false); }
768	>	public void testGetWaitQueueLength_fair() { testGetWaitQueueLength(true); }
769	>	public void testGetWaitQueueLength(boolean fair) {
770	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
771	>	final Condition c = lock.newCondition();
772	>	final CountDownLatch locked1 = new CountDownLatch(1);
773	>	final CountDownLatch locked2 = new CountDownLatch(1);
774	>	Thread t1 = new Thread(new CheckedRunnable() {
775	>	public void realRun() throws InterruptedException {
776	>	lock.lock();
777	>	assertFalse(lock.hasWaiters(c));
778	>	assertEquals(0, lock.getWaitQueueLength(c));
779	>	locked1.countDown();
780	>	c.await();
781	>	lock.unlock();
782	>	}});
783	>
784	>	Thread t2 = new Thread(new CheckedRunnable() {
785	>	public void realRun() throws InterruptedException {
786	>	lock.lock();
787	>	assertTrue(lock.hasWaiters(c));
788	>	assertEquals(1, lock.getWaitQueueLength(c));
789	>	locked2.countDown();
790	>	c.await();
791	>	lock.unlock();
792	>	}});
793	>
794	>	lock.lock();
795	>	assertEquals(0, lock.getWaitQueueLength(c));
796	>	lock.unlock();
797	>
798	>	t1.start();
799	>	await(locked1);
800	>
801	>	lock.lock();
802	>	assertHasWaiters(lock, c, t1);
803	>	assertEquals(1, lock.getWaitQueueLength(c));
804	>	lock.unlock();
805	>
806	>	t2.start();
807	>	await(locked2);
808	>
809	>	lock.lock();
810	>	assertHasWaiters(lock, c, t1, t2);
811	>	assertEquals(2, lock.getWaitQueueLength(c));
812	>	c.signalAll();
813	>	assertHasNoWaiters(lock, c);
814	>	lock.unlock();
815	>
816	>	awaitTermination(t1);
817	>	awaitTermination(t2);
818	>
819	>	assertHasNoWaiters(lock, c);
820		}
821
822	<	public void testAwaitNanos_Interrupt() {
823	<	final ReentrantLock lock = new ReentrantLock();
822	>	/**
823	>	* getWaitingThreads returns only and all waiting threads
824	>	*/
825	>	public void testGetWaitingThreads()      { testGetWaitingThreads(false); }
826	>	public void testGetWaitingThreads_fair() { testGetWaitingThreads(true); }
827	>	public void testGetWaitingThreads(boolean fair) {
828	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
829		final Condition c = lock.newCondition();
830	<	Thread t = new Thread(new Runnable() {
831	<	public void run() {
832	<	try {
833	<	lock.lock();
834	<	c.awaitNanos(SHORT_DELAY_MS * 2 * 1000000);
835	<	lock.unlock();
836	<	threadFail("should throw");
837	<	}
838	<	catch(InterruptedException success) {
839	<	}
840	<	}
841	<	});
842	<
843	<	try {
844	<	t.start();
845	<	Thread.sleep(SHORT_DELAY_MS);
846	<	t.interrupt();
847	<	t.join(SHORT_DELAY_MS);
848	<	assertFalse(t.isAlive());
849	<	}
850	<	catch (Exception ex) {
851	<	fail("unexpected exception");
852	<	}
830	>	final CountDownLatch locked1 = new CountDownLatch(1);
831	>	final CountDownLatch locked2 = new CountDownLatch(1);
832	>	Thread t1 = new Thread(new CheckedRunnable() {
833	>	public void realRun() throws InterruptedException {
834	>	lock.lock();
835	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
836	>	locked1.countDown();
837	>	c.await();
838	>	lock.unlock();
839	>	}});
840	>
841	>	Thread t2 = new Thread(new CheckedRunnable() {
842	>	public void realRun() throws InterruptedException {
843	>	lock.lock();
844	>	assertFalse(lock.getWaitingThreads(c).isEmpty());
845	>	locked2.countDown();
846	>	c.await();
847	>	lock.unlock();
848	>	}});
849	>
850	>	lock.lock();
851	>	assertTrue(lock.getWaitingThreads(c).isEmpty());
852	>	lock.unlock();
853	>
854	>	t1.start();
855	>	await(locked1);
856	>
857	>	lock.lock();
858	>	assertHasWaiters(lock, c, t1);
859	>	assertTrue(lock.getWaitingThreads(c).contains(t1));
860	>	assertFalse(lock.getWaitingThreads(c).contains(t2));
861	>	assertEquals(1, lock.getWaitingThreads(c).size());
862	>	lock.unlock();
863	>
864	>	t2.start();
865	>	await(locked2);
866	>
867	>	lock.lock();
868	>	assertHasWaiters(lock, c, t1, t2);
869	>	assertTrue(lock.getWaitingThreads(c).contains(t1));
870	>	assertTrue(lock.getWaitingThreads(c).contains(t2));
871	>	assertEquals(2, lock.getWaitingThreads(c).size());
872	>	c.signalAll();
873	>	assertHasNoWaiters(lock, c);
874	>	lock.unlock();
875	>
876	>	awaitTermination(t1);
877	>	awaitTermination(t2);
878	>
879	>	assertHasNoWaiters(lock, c);
880		}
881
882	<	public void testAwaitUntil_Interrupt() {
883	<	final ReentrantLock lock = new ReentrantLock();
884	<	final Condition c = lock.newCondition();
885	<	Thread t = new Thread(new Runnable() {
886	<	public void run() {
887	<	try {
888	<	lock.lock();
889	<	java.util.Date d = new java.util.Date();
890	<	c.awaitUntil(new java.util.Date(d.getTime() + 10000));
643	<	lock.unlock();
644	<	threadFail("should throw");
645	<	}
646	<	catch(InterruptedException success) {
647	<	}
648	<	}
649	<	});
882	>	/**
883	>	* awaitUninterruptibly is uninterruptible
884	>	*/
885	>	public void testAwaitUninterruptibly()      { testAwaitUninterruptibly(false); }
886	>	public void testAwaitUninterruptibly_fair() { testAwaitUninterruptibly(true); }
887	>	public void testAwaitUninterruptibly(boolean fair) {
888	>	final ReentrantLock lock = new ReentrantLock(fair);
889	>	final Condition c = lock.newCondition();
890	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(2);
891
892	<	try {
893	<	t.start();
894	<	Thread.sleep(SHORT_DELAY_MS);
895	<	t.interrupt();
896	<	t.join(SHORT_DELAY_MS);
897	<	assertFalse(t.isAlive());
898	<	}
899	<	catch (Exception ex) {
900	<	fail("unexpected exception");
901	<	}
892	>	Thread t1 = newStartedThread(new CheckedRunnable() {
893	>	public void realRun() {
894	>	// Interrupt before awaitUninterruptibly
895	>	lock.lock();
896	>	pleaseInterrupt.countDown();
897	>	Thread.currentThread().interrupt();
898	>	c.awaitUninterruptibly();
899	>	assertTrue(Thread.interrupted());
900	>	lock.unlock();
901	>	}});
902	>
903	>	Thread t2 = newStartedThread(new CheckedRunnable() {
904	>	public void realRun() {
905	>	// Interrupt during awaitUninterruptibly
906	>	lock.lock();
907	>	pleaseInterrupt.countDown();
908	>	c.awaitUninterruptibly();
909	>	assertTrue(Thread.interrupted());
910	>	lock.unlock();
911	>	}});
912	>
913	>	await(pleaseInterrupt);
914	>	lock.lock();
915	>	lock.unlock();
916	>	t2.interrupt();
917	>
918	>	assertThreadStaysAlive(t1);
919	>	assertTrue(t2.isAlive());
920	>
921	>	lock.lock();
922	>	c.signalAll();
923	>	lock.unlock();
924	>
925	>	awaitTermination(t1);
926	>	awaitTermination(t2);
927		}
928
929	<	public void testSignalAll() {
930	<	final ReentrantLock lock = new ReentrantLock();
929	>	/**
930	>	* await/awaitNanos/awaitUntil is interruptible
931	>	*/
932	>	public void testInterruptible_await()           { testInterruptible(false, AwaitMethod.await); }
933	>	public void testInterruptible_await_fair()      { testInterruptible(true,  AwaitMethod.await); }
934	>	public void testInterruptible_awaitTimed()      { testInterruptible(false, AwaitMethod.awaitTimed); }
935	>	public void testInterruptible_awaitTimed_fair() { testInterruptible(true,  AwaitMethod.awaitTimed); }
936	>	public void testInterruptible_awaitNanos()      { testInterruptible(false, AwaitMethod.awaitNanos); }
937	>	public void testInterruptible_awaitNanos_fair() { testInterruptible(true,  AwaitMethod.awaitNanos); }
938	>	public void testInterruptible_awaitUntil()      { testInterruptible(false, AwaitMethod.awaitUntil); }
939	>	public void testInterruptible_awaitUntil_fair() { testInterruptible(true,  AwaitMethod.awaitUntil); }
940	>	public void testInterruptible(boolean fair, final AwaitMethod awaitMethod) {
941	>	final PublicReentrantLock lock =
942	>	new PublicReentrantLock(fair);
943		final Condition c = lock.newCondition();
944	<	Thread t1 = new Thread(new Runnable() {
945	<	public void run() {
946	<	try {
947	<	lock.lock();
948	<	c.await();
949	<	lock.unlock();
950	<	}
951	<	catch(InterruptedException e) {
952	<	threadFail("unexpected exception");
953	<	}
954	<	}
955	<	});
956	<
957	<	Thread t2 = new Thread(new Runnable() {
958	<	public void run() {
959	<	try {
960	<	lock.lock();
961	<	c.await();
962	<	lock.unlock();
963	<	}
964	<	catch(InterruptedException e) {
965	<	threadFail("unexpected exception");
966	<	}
689	<	}
690	<	});
944	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
945	>	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
946	>	public void realRun() throws InterruptedException {
947	>	lock.lock();
948	>	assertLockedByMoi(lock);
949	>	assertHasNoWaiters(lock, c);
950	>	pleaseInterrupt.countDown();
951	>	try {
952	>	await(c, awaitMethod);
953	>	} finally {
954	>	assertLockedByMoi(lock);
955	>	assertHasNoWaiters(lock, c);
956	>	lock.unlock();
957	>	assertFalse(Thread.interrupted());
958	>	}
959	>	}});
960	>
961	>	await(pleaseInterrupt);
962	>	assertHasWaiters(lock, c, t);
963	>	t.interrupt();
964	>	awaitTermination(t);
965	>	assertNotLocked(lock);
966	>	}
967
968	<	try {
969	<	t1.start();
970	<	t2.start();
971	<	Thread.sleep(SHORT_DELAY_MS);
972	<	lock.lock();
973	<	c.signalAll();
974	<	lock.unlock();
975	<	t1.join(SHORT_DELAY_MS);
976	<	t2.join(SHORT_DELAY_MS);
977	<	assertFalse(t1.isAlive());
978	<	assertFalse(t2.isAlive());
979	<	}
980	<	catch (Exception ex) {
981	<	fail("unexpected exception");
968	>	/**
969	>	* signalAll wakes up all threads
970	>	*/
971	>	public void testSignalAll_await()           { testSignalAll(false, AwaitMethod.await); }
972	>	public void testSignalAll_await_fair()      { testSignalAll(true,  AwaitMethod.await); }
973	>	public void testSignalAll_awaitTimed()      { testSignalAll(false, AwaitMethod.awaitTimed); }
974	>	public void testSignalAll_awaitTimed_fair() { testSignalAll(true,  AwaitMethod.awaitTimed); }
975	>	public void testSignalAll_awaitNanos()      { testSignalAll(false, AwaitMethod.awaitNanos); }
976	>	public void testSignalAll_awaitNanos_fair() { testSignalAll(true,  AwaitMethod.awaitNanos); }
977	>	public void testSignalAll_awaitUntil()      { testSignalAll(false, AwaitMethod.awaitUntil); }
978	>	public void testSignalAll_awaitUntil_fair() { testSignalAll(true,  AwaitMethod.awaitUntil); }
979	>	public void testSignalAll(boolean fair, final AwaitMethod awaitMethod) {
980	>	final PublicReentrantLock lock = new PublicReentrantLock(fair);
981	>	final Condition c = lock.newCondition();
982	>	final CountDownLatch pleaseSignal = new CountDownLatch(2);
983	>	class Awaiter extends CheckedRunnable {
984	>	public void realRun() throws InterruptedException {
985	>	lock.lock();
986	>	pleaseSignal.countDown();
987	>	await(c, awaitMethod);
988	>	lock.unlock();
989	>	}
990		}
991	+
992	+	Thread t1 = newStartedThread(new Awaiter());
993	+	Thread t2 = newStartedThread(new Awaiter());
994	+
995	+	await(pleaseSignal);
996	+	lock.lock();
997	+	assertHasWaiters(lock, c, t1, t2);
998	+	c.signalAll();
999	+	assertHasNoWaiters(lock, c);
1000	+	lock.unlock();
1001	+	awaitTermination(t1);
1002	+	awaitTermination(t2);
1003		}
1004
1005	<	public void testSerialization() {
1006	<	ReentrantLock l = new ReentrantLock();
1007	<	l.lock();
1008	<	l.unlock();
1009	<
1010	<	try {
1011	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
1012	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
1013	<	out.writeObject(l);
1014	<	out.close();
1015	<
1016	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
1017	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
1018	<	ReentrantLock r = (ReentrantLock) in.readObject();
1019	<	r.lock();
1020	<	r.unlock();
1021	<	} catch(Exception e){
1022	<	e.printStackTrace();
1023	<	fail("unexpected exception");
1024	<	}
1005	>	/**
1006	>	* signal wakes up waiting threads in FIFO order
1007	>	*/
1008	>	public void testSignalWakesFifo()      { testSignalWakesFifo(false); }
1009	>	public void testSignalWakesFifo_fair() { testSignalWakesFifo(true); }
1010	>	public void testSignalWakesFifo(boolean fair) {
1011	>	final PublicReentrantLock lock =
1012	>	new PublicReentrantLock(fair);
1013	>	final Condition c = lock.newCondition();
1014	>	final CountDownLatch locked1 = new CountDownLatch(1);
1015	>	final CountDownLatch locked2 = new CountDownLatch(1);
1016	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1017	>	public void realRun() throws InterruptedException {
1018	>	lock.lock();
1019	>	locked1.countDown();
1020	>	c.await();
1021	>	lock.unlock();
1022	>	}});
1023	>
1024	>	await(locked1);
1025	>
1026	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1027	>	public void realRun() throws InterruptedException {
1028	>	lock.lock();
1029	>	locked2.countDown();
1030	>	c.await();
1031	>	lock.unlock();
1032	>	}});
1033	>
1034	>	await(locked2);
1035	>
1036	>	lock.lock();
1037	>	assertHasWaiters(lock, c, t1, t2);
1038	>	assertFalse(lock.hasQueuedThreads());
1039	>	c.signal();
1040	>	assertHasWaiters(lock, c, t2);
1041	>	assertTrue(lock.hasQueuedThread(t1));
1042	>	assertFalse(lock.hasQueuedThread(t2));
1043	>	c.signal();
1044	>	assertHasNoWaiters(lock, c);
1045	>	assertTrue(lock.hasQueuedThread(t1));
1046	>	assertTrue(lock.hasQueuedThread(t2));
1047	>	lock.unlock();
1048	>	awaitTermination(t1);
1049	>	awaitTermination(t2);
1050		}
1051
1052	+	/**
1053	+	* await after multiple reentrant locking preserves lock count
1054	+	*/
1055	+	public void testAwaitLockCount()      { testAwaitLockCount(false); }
1056	+	public void testAwaitLockCount_fair() { testAwaitLockCount(true); }
1057	+	public void testAwaitLockCount(boolean fair) {
1058	+	final PublicReentrantLock lock = new PublicReentrantLock(fair);
1059	+	final Condition c = lock.newCondition();
1060	+	final CountDownLatch pleaseSignal = new CountDownLatch(2);
1061	+	Thread t1 = newStartedThread(new CheckedRunnable() {
1062	+	public void realRun() throws InterruptedException {
1063	+	lock.lock();
1064	+	assertLockedByMoi(lock);
1065	+	assertEquals(1, lock.getHoldCount());
1066	+	pleaseSignal.countDown();
1067	+	c.await();
1068	+	assertLockedByMoi(lock);
1069	+	assertEquals(1, lock.getHoldCount());
1070	+	lock.unlock();
1071	+	}});
1072	+
1073	+	Thread t2 = newStartedThread(new CheckedRunnable() {
1074	+	public void realRun() throws InterruptedException {
1075	+	lock.lock();
1076	+	lock.lock();
1077	+	assertLockedByMoi(lock);
1078	+	assertEquals(2, lock.getHoldCount());
1079	+	pleaseSignal.countDown();
1080	+	c.await();
1081	+	assertLockedByMoi(lock);
1082	+	assertEquals(2, lock.getHoldCount());
1083	+	lock.unlock();
1084	+	lock.unlock();
1085	+	}});
1086	+
1087	+	await(pleaseSignal);
1088	+	lock.lock();
1089	+	assertHasWaiters(lock, c, t1, t2);
1090	+	assertEquals(1, lock.getHoldCount());
1091	+	c.signalAll();
1092	+	assertHasNoWaiters(lock, c);
1093	+	lock.unlock();
1094	+	awaitTermination(t1);
1095	+	awaitTermination(t2);
1096	+	}
1097	+
1098	+	/**
1099	+	* A serialized lock deserializes as unlocked
1100	+	*/
1101	+	public void testSerialization()      { testSerialization(false); }
1102	+	public void testSerialization_fair() { testSerialization(true); }
1103	+	public void testSerialization(boolean fair) {
1104	+	ReentrantLock lock = new ReentrantLock(fair);
1105	+	lock.lock();
1106	+
1107	+	ReentrantLock clone = serialClone(lock);
1108	+	assertEquals(lock.isFair(), clone.isFair());
1109	+	assertTrue(lock.isLocked());
1110	+	assertFalse(clone.isLocked());
1111	+	assertEquals(1, lock.getHoldCount());
1112	+	assertEquals(0, clone.getHoldCount());
1113	+	clone.lock();
1114	+	clone.lock();
1115	+	assertTrue(clone.isLocked());
1116	+	assertEquals(2, clone.getHoldCount());
1117	+	assertEquals(1, lock.getHoldCount());
1118	+	clone.unlock();
1119	+	clone.unlock();
1120	+	assertTrue(lock.isLocked());
1121	+	assertFalse(clone.isLocked());
1122	+	}
1123	+
1124	+	/**
1125	+	* toString indicates current lock state
1126	+	*/
1127	+	public void testToString()      { testToString(false); }
1128	+	public void testToString_fair() { testToString(true); }
1129	+	public void testToString(boolean fair) {
1130	+	ReentrantLock lock = new ReentrantLock(fair);
1131	+	assertTrue(lock.toString().contains("Unlocked"));
1132	+	lock.lock();
1133	+	assertTrue(lock.toString().contains("Locked"));
1134	+	lock.unlock();
1135	+	assertTrue(lock.toString().contains("Unlocked"));
1136	+	}
1137		}

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